Tethys (eayst)

Ta Tethys (Greagish: Τηθύς) ny eayst ta cruinlaghey y planaid Sarn feddynit magh ec Giovanni Domenico Cassini 'sy vlein 1684.

 Troyn fishigagh 
 Eaystyn Troyagh 
Ta ny h-eaystyn Telesto as Calypso soit çheusthie dy ny poyntyn Lagrange L4 as L5 60 keimyn er y chione as ny yei Tethys as çheusthie y chruinlee.

 Imraaghyn 

 Kianglaghyn magh 

 Gruaie Tethys ec Ronsaghey Magh Corys ny Greiney NASA
 Caslys queeyllagh Tethys (Voyager)
 The Planetary Society: Tethys


Ronney:Eaystyn Harn
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Ronney:Feddynyssyn lesh Giovanni Domenico Cassini
Ronney:Eaystyn as cruinlee far-ghraadagh oc